Not sure I mentioned this, but when I didn't have the radiation, I was to take the Anastrole (Arimidex) pill? I tried a few and had hot flashes immediately which surprised me? Then I read that within 24 hours of taking the first pill your estrogen level goes down by 70%. That indicated to me the medication was very strong at only 1 ml, so I decided not to continue. Even then the hot flashes persisted (without the pill) for almost three weeks, several times per day. I hadn't had those for many, many years so I knew it was the pill. It's just my personal opinion, but if you're cancer was small with clear margins and no lymph node involvement, it makes sense after surgery not to pile on more than my pretty aged, at 79, body can handle. That's me anyway, as it probably takes some time to heal both the breast and the sentinel lymph node surgery. Blessings to you and I'm sure you will live a long and healthy life.